You could say Kouzuki Mahiru peaked early, and as such is in a state of arrested development.
Her grade school-age little sister even notices it.
She wanders the gloriously-depicted streets of Shibuya aimlessly, like a jellyfish.

Shibuya itself feels like a giant aquarium teeming with life and color.
Mahiru follows this girl like a stalker, but ends up getting caught.
Mahiru learns that Kano was once a pop idol, but things happened and she went down in flames.

Mahiru, for her part, loves Kanos music.
She snaps back that Kano cant understand because shes special and never hated herself.
Shedoesntwant to be run-of-the-mill, and Kanos love of her art showed her that she doesnt have to be.

Its double whammy the two have common cause to protest.
Mahiru uses her lipstick to draw winking eyes on the jellyfish with a dramatic fluorish.